Hi Curtis,
Thanks for the explanations (and underlying research). Now it makes more sense. And that's a very interesting tidbit: An ISP grabbing all port 25 traffic and running it through their smtp servers. Or might your Dad have an smtp proxy on his machine, which he might have unknowingly installed as part of some "wireless setup" where he is staying? I just hadn't heard of a port grab like that before. i.e. So far I've only heard about ISP's blocking (like Telus blocking outbound port 25). But I know that some client based antivirus and antispam tools intercept smtp and/or pop3 ports. So that's why I was wondering is it possible, that the port grab actually might be happening on his own machine?
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